html,body,#app{
    padding: 0 ;
    margin: 0 ;
}
html,body,#app{
    height: 100%;
}
textarea{
    border: none;
    outline: none;
}
button{
    border: none;
    outline: none;
}
a{
    text-decoration: none;
    color: #333;
}
li{
    list-style-type: none;
}